package jmp123.shell.vo;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class Group {
	private String name;
	private List<Song> songs;

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public List<Song> listSongs() {
		if (this.songs == null) {
			return Collections.emptyList();
		}
		return Collections.unmodifiableList(songs);
	}

	public void addSong(Song song) {
		if (song == null) {
			return;
		}
		if (this.songs == null) {
			this.songs = new ArrayList<Song>();
		}
		this.songs.add(song);
	}

	public void removeSong(Song song) {
		if (this.songs != null) {
			this.songs.remove(song);
		}
	}

	@Override
	public String toString() {
		return this.name;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((name == null) ? 0 : name.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Group other = (Group) obj;
		if (name == null) {
			if (other.name != null)
				return false;
		} else if (!name.equals(other.name))
			return false;
		return true;
	}

}
